emmetropia

American  

[em-i-troh-pee-uh] / ˌɛm ɪˈtroʊ pi ə /

noun

Ophthalmology.

1. the normal refractive condition of the eye, in which the rays of light are accurately focused on the retina.

---

emmetropia British  

/ ˌɛmɪˈtrɒpɪk, ˌɛmɪˈtrəʊpɪə /

noun

1. the normal condition of perfect vision, in which parallel light rays are focused on the retina without the need for accommodation

---

Other Word Forms

• emmetrope noun
• emmetropic adjective

Etymology

Origin of emmetropia

1860–65; < New Latin, equivalent to emmetr- (stem of Greek émmetros in measure, equivalent to em- em- ² + métr ( on ) measure + -os adj. suffix) + -opia -opia

Example Sentences

On looking to the left homonymous diplopia is present, on looking to the front and the right binocular single vision and no squint; on both sides emmetropia and full acuity of vision.

From Schweigger on Squint A Monograph by Dr. C. Schweigger by Schweigger, C.

Three years later, when the child had learnt to read, emmetropia and full visual acuteness was observed in the right eye, with the left No. 4·0 only is read with difficulty.

From Schweigger on Squint A Monograph by Dr. C. Schweigger by Schweigger, C.

Afterwards, Donders sought to explain the occurrence of convergent strabismus in emmetropia by paresis of accommodation, which must indeed, according to his theory, produce the same result as hypermetropia.

From Schweigger on Squint A Monograph by Dr. C. Schweigger by Schweigger, C.

Those cases deserve particular mention, in which it remained doubtful whether hypermetropia of slight degree or emmetropia was present.

From Schweigger on Squint A Monograph by Dr. C. Schweigger by Schweigger, C.

On both sides apparent emmetropia or very slight hypermetropia, acuity of vision on left side 5/9, on the right 5/18, ophthalmoscopic diagnosis of refraction was impossible on account of restless fixation.

From Schweigger on Squint A Monograph by Dr. C. Schweigger by Schweigger, C.